DS21354/DS21554 3.3V/5V E1 Single-Chip Transceivers
3. PIN DESCRIPTION
Table 3-1. Pin Description Sorted by Pin Number
PIN
NAME
RCHBLK
JTMS
TYPE
FUNCTION
1
O
I
Receive Channel Block
2
IEEE 1149.1 Test Mode Select
8.192 MHz Clock
3
8MCLK
JTCLK
JTRST
RCL
O
I
4
IEEE 1149.1 Test Clock Signal
IEEE 1149.1 Test Reset, Active Low
Receive Carrier Loss
5
I
6
O
I
7
JTDI
IEEE 1149.1 Test Data Input
8, 9, 15,
23, 26, 27,
N.C.
—
No Connect. Do not connect any signal to this pin.
28
10
JTDO
BTS
O
I
IEEE 1149.1 Test Data Output
Bus Type Select
11
12
LIUC
I
Line Interface Connect
Eight Times Clock
Test
13
8XCLK
TEST
O
I
14
16
RTIP
I
Receive Analog Tip Input
Receive Analog Ring Input
Receive Analog Positive Supply
Receive Analog Signal Ground
Master Clock Input
17
RRING
RVDD
RVSS
I
18
–
19, 20, 24
21
–
MCLK
XTALD
INT
I
22
O
O
O
–
Quartz Crystal Driver
Interrupt, Active Low
25
29
TTIP
TVSS
Transmit Analog Tip Output
Transmit Analog Signal Ground
Transmit Analog Positive Supply
Transmit Analog Ring Output
Transmit Channel Block
Transmit Link Clock
30
31
TVDD
TRING
TCHBLK
TLCLK
TLINK
CI
–
32
O
O
O
I
33
34
35
Transmit Link Data
36
I
I/O
I
I
I
O
O
O
Carry In
37
TSYNC
TPOSI
TNEGI
TCLKI
TCLKO
TNEGO
TPOSO
Transmit Sync
38
Transmit Positive Data Input
Transmit Negative Data Input
Transmit Clock Input
Transmit Clock Output
Transmit Negative Data Output
Transmit Positive Data Output
39
40
41
42
43
44, 61,
81,83
45, 60, 80,
84
DVDD
—
Digital Positive Supply
DVSS
—
Digital Signal Ground
46
TCLK
TSER
TSIG
I
I
I
Transmit Clock
Transmit Serial Data
Transmit Signaling Input
47
48
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
